Glass-blower&#39;s machine.



No. 657,097. Patented Sept. 4, |900. C. A. DUNBAR.

GLASS BLOWERS MACHINE.

(Application tiled Mar. 5, 1900.) K (No Model.) 2 Sheets-Sheet l.

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No. 657,097. Patented Sept. 4, |900. C. A. DUNBAR.

GLASS BLUWEHS MACHINE.

(Application led Mar. 5, 1900.)

(No Model.) 2 Sheets-Sheet 2.

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CLEMENT A. DUNBAR, OF DETROIT, MICHIGAN.

GLASS=BLOWERS MACHINE.

SPECIFICATION forming part of Letters Patent No. 657,097, datedSeptember 4, 1900. Application i'llecl March 5,1900. Serial No. 7,383.(No model.)

To @ZZ whom it may concern:

Be it known that I, CLEMENT A. DUNBAR, a citizen of the United States,residing at Detroit, in the county of vVayne and State of Michigan, haveinvented certain new and useful Improvements in Glass-Blowers Machines,of which the following is a specification, reference being had thereinio the accompanying drawings.

The invention consists in the construction of a glass-blowers machine,and particularly in the construction of a machine comprising a movablemold which is closed at the blowing-point and is then moved away fromthe blowing-point and opened, the opening being effected in such a wayas to prevent the pos sibility of injuring the blown article.

The invention further consists in the construction of the various parts,as more fully hereinafter described and then specifically pointed out inthe claims.

In the drawings, Figure l is a plan view of my machine. Fig. 2 is avertical central section thereof on line 0c, showing at the right handin dotted lines the blowpipe, with the gather thereon, when inserted inposition in the mold and at the left hand a finished bottle standing inthe opened mold. Fig. 3 is a section on line y y, Fig. l, illustratingthe construction of the mechanism for closing the mold. Fig. 4 is aperspective illustrating theholding device for one section of the moldat the blowing-point. Fig. 5 is a vertical section showing that holdingdevice in connection with the connections to the mold-section. Fig. 6 isa perspective view of one of the molds and portion of the camway whichactuates one of the mold-sections, showing that moldsection lifted toclear the blown article. Fig. 7 is a vertical section through the mold,the section L thereof being slightly raised.

My invention is vparticularly intended as an assistance to theglass-blower. It is intended to be operated either by the glassblowersthemselves or by an attendant, or both, and to provide mechanical meansto open the mold-sections perfectly without danger of damage to theblown article, thus obviating the use of the boy ordinarily employed bythe glass-blowers to open the mold. It is well known that boys, eventhough eX- perienced in this work, destroya large per cent. of the blownarticles, and thus reduce the output of the blower, to say nothing ofthe expense of employing such boys and the uncertainty of their being onhand when wanted. The machine also is intended to enable the blowers tooperate more rapidly, and thus in a given time to turn out more finishedproduct than by the old device.

A is the base of the machine, B being the top thereof, which isstationary. Above the top is a mold-carrier C, shown in the form of atable turning upon the central pivot D. This pivot has at its lower enda bevel-pinion E, meshing with the bevel gear-Wheel F upon the shaft G,journaled in horizontal bearings in the base. On the shaft G is aratchetwheel II, which is shown in Fig. 2 by breaking away part of thegear-wheel F.

I is a lever on the shaft G and having a pawl J engaging with theratchet-wheel. K is a second lever journaled in the base, having thebearings a a above the lever I and arranged so as to successivelyimpinge upon the lever I as the lever K is moved downward. By depressingthe lever K the operator through the mechanism described will im part tothe mold carrier or table C a rotational movement. The amount of thisrotational movement may be determined by the relative size of the wheelsE and F. In this case I have shown the movement at each operation asone-quarter of a revolution of the table C. That is not essential, asfor different classes of work different gear-wheels may be used and thetable given eitheran entire revolution or such fractional part thereofas is de sired. In case, for instance, I use but one mold on a table itwould travel the entire distance around the circle. if I used two molds,it would move a half-circle, and if I used three molds it would move thethird of a circle, and so far as a certain feature of my invention isconcerned-that is, for opening and closing the mold in the desiredmannerit is immaterial what movement is given to the carriage at eachoperation. The ordinary form, however, will be that shown in thedrawings, in which it takesfour operations of the lever K to make acomplete rotation of the mold-carrier.

My machine is intended to be used in connection with the ordinary moldswhich every IOO glass-factory has in use, so that manufacture of specialmolds will not be required, and I have therefore shown an ordinarytwo-section mold comprising the sections L and L', pivoted upon the pinsM, which are fixed to the table or to a base (not shown)` which might befixed to the table. Between these sections and in the proper relationthereto is secured to the table the bottom plate O. I have shown itsecured by means of a set-screw c, passing through the table. Thisbottom plate may be made an integral part of the table-C, or in casewhere ordinary molds with a base-plate are used it may be attachedthereon in the usual manner. The molds have the usual opening for thehandles, and in the mold section L may be secured the `usual handle P,while in the n1old-section L I secure an eyebolt or block Q. To thehandle P is attached a block Q, preferably by making a sleeve thereonthrough which the handle passes and locking the block to the handle inany suitable manner, as by a setscrew d. This block has a verticalaperture, through which passes a vertical stem e at its lower end,carrying a grooved roller h, riding on a camway R. Aset-screw tadjustably secures together the block and the stem e.-

c is a curved friction-shoe upon the block Q. This friction shoe isadapted to bear against a holding device (shown in Fig. 4) consisting ofa roller Z, sleeved on the arm m of a bell-crank lever pivoted on thepin n, the other arm o of which has a counterweight p thereon.

q shows friction-rollersof larger diameter than the roller Z and atopposite ends thereof and bearing against the vertical plate fr, towhich the pivot-pin n is secured.

The eyebolt Q engages with the vertical pin S on the end of themold-actuating arm S', forming an adjustable pivotal connection betweenthese parts,which arm extends across the table C and is connected to asliding block s. This connection I preferably make adjustable by meansof a stem s', engaging an aperture in the end of the arm S' and held bymeans of a set-screw t. The block s has a headed pin u passing through alongitudinal slot in the table.

T is a slide working in suitable guides upon the upper face of the top Bof the base and having a lug or projection w near its end eX- tending upbehind the lower end of the pin u. This slide T may be actuated in anysuitable manner-as, for instance, by the bellcrank lever T, connectedthereto, which in turn is actuated by the foot-rod T2, extending up inthe position for the operator to place his foot upon the top. It isevident that if the operator places his foot upon the footrod T2 he willthrough the connections described move the arm S and with it themoldseetion L to its closed position. The camway R preferably extendsentirely around the table and is of a shape to be hereinafter describedfor the purpose of opening and closing the mold-section L.

Vhile I have described but one mold and the connections thereto, it willbe understood that each mold has a similar connection and attachmentsand that each will be operated as follows: The foot-rod T2 is located atthe point where the blower stands. This is represented in Figs. l and 2of the drawings as at the right hand thereof. In this position themold-section L/ at the blowing-point is held in its closed position bythe wedging of the roller l between the shoe 7a and the plate r, thusholding one moldsection stationary in its closed position, so that theoperator may rest his blowpipe against it and centerY the gathertherein. As soon as the gather is in position the operator presses downupon the foot-rod T2 and through the connections described pushes in thearm S' and closes the mold-section L. I-Ie then blows the bottle in theordinary manner and breaks away the blowpipe above the top of the mold,leaving the blown article within the closed mold. The operator or boywho is upon the opposite side of the machine for the purpose of carryingaway the bottles or handing them to the carrier depresses the leverK,and thus through the connections previously described rotates thetable one-quarter turn, the mold moving from the blowing position to theposition numbered 2 at the top of Fig. 1, the mold-section stillremaining closed, and another mold moving from the position numbered 4is moved into the blowing position ready for the same or another blowerto blow a bottle therein. The mold at the position numbered 2 will thusremain during the blowing of the next bottle and for sufficient time tocool if that time is necessary, as is required in certain classes ofWork. The downward movement of the lever K rocks the lever I, and thelever I has connected to it a rock-arm U, which is connected to arock-arm U by connecting rod U2, the rock-arm U being on a shaft V, towhich is connected the bell-crank lever T. Thus the downward movement ofthe lever K will raise the foot-rod T2 to its original position andreturn the slide T, ready for another operation. It is obvious that asthis has a rigid connection the subsequent movement of the foot-rod T2will raise the lever K to its initial position. After the mold hasremained at the position numbered 2 during the blowing of the nextarticle the next operation of the lever K moves it from that position tothe position numbered 3, and in traveling from the position 2 to theposition 3 the mold will be opened. As the mold leaves the position 2the first operation of opening is to slightly lift the mold-section L',so as to free it from the shoulder of the bottle, and then very slightlyopen it. The lifting operation is effected by the running up of theroller h upon the cam e on the camway R, which is shown in Fig. 6, thatgure illustrating the section L of the mold in its slightly-raisedposition.

IIIO

opened, but the section L does not commence to open until the section L'has first been lifted, as described, and opened suiciently to allow afilm of air to pass around the bottle upon one side and stiften theglass by chilling it and also to admit the air gradually, so that theopening ot' the mold will not prod ucc sutlicient suction to draw outorbulge the plastic bottle. The section L is opened by the engagement ofthe head of the pin u with the cam tr during the travel ofthe mold fromthe position 2 to the position 3. This cam is shown in dotted lines inFig. l and is shown in elevation at the right hand of Fig. 2, beingformed upon or attached to the stationary table or top B. When the moldreaches the position 3, it is opened wide enough to permit thewithdrawal of the blown article, and all that is required in the furthermovement from position 3 to the blowing position is that the section Lshall be moved by the camway R to the closed position previouslydescribed. In order to stop the machine at the proper point, I have aseries of pins fr, Figs. l and 3, which are adapted to strike againstthe end of the slide T when that slide is in its innermost position, andthus stop the table at the proper point. It is evident that as soon asthe slide T is moved longitudinally when the operator presses down uponthe rod T2 the slide will be withdrawn from the path of the pin :c andthe table be then moved to the next position.

I preferably apply a brake to the table to prevent any rebound orbackward movement. This may be ot' a'ny suitable form. I have shown thefriction-roller V' journaled in the slide V2 upon the slide T and heldin frictional engagement in the inner position of the slide T by meansof the spring V8. Any other form of brake may be employed for thispurpose.

By arrangingthe pin S in the end of the arm S of some considerablelength I am enabled to use molds of different sizes upon the samemachine. Vertical adjustment is also provided between the handle P andthe roller 7L by the adjustable engagement ofthe stem c in the block Q,and longitudinal adjustment between that block and the mold-section L isprovided by means of the set-screw d.

l. An operating device for glass-blowers molds comprising in combinationwith a carrier, and a multiple of molds thereon, of means by which theoperator may close the mold at the blowing-point, and mechanism by whichan operator may move the carrier and thereby open a mold containing ablown article.

2. An operating device for glass-blowers molds comprisingin combinationwith an endless carrier, and a mold thereon, of means by which theoperator may close the mold at the blowing-point, and mechanism by whichan operator lnayactuate the carrier to move the filled mold away fromthe blower and for opening the mold during such movement.

3. In a glass-blowers machine, a traveling sectional mold, means foractuating one section of the mold from its open to its closed position,in moving to the blowing-point, and separate, operator-controlled meansfor closing the other section.

4. Ina glass-blowers machine, means for raising a mold-section, andmeans for separating the sections after such raising.

5. In a glass-blowers machine, means for performing the followingoperations successively for raisinga mold-section, then slightly openingthe same so as to admit a film of air around the article on one side,and then to gradually open the mold.

6. In a glass-blowers machine, means for raising one section of asectional mold, means for slightly opening the same, and means for thengradually opening both moldsections. U

7. In a glass-blowers machine, a traveling sectional mold, meansoperating during the 9 travel to vertically separate the mold andarticle, and then to gradually open the mold sections.

8. In a glass-blowers machine, a traveling sectional mold, meansoperating during the travel of the mold to first separate a moldsectionfrom the article by a vertical movement, means for then slightly openingthe said section, and means for then opening the mold gradually, to itsopen position.

9. In a glassblowers machine, a movable mold-carrier, a mold thereonhaving movable mold-sections, means for opening both sections and forclosing one section during the travel of the mold, and means under thecontrol of the operator forfclosing the other scc tion at theblowing-point.

lO. In a glass-blowers machine, a sectional mold movable to and from theblowing-point, means for actuating one mold-section to its closedposition in moving to the blowingpoint', the other mold-section beingfree, and operator-controlled devices for closing said free section. l

1l. In a glass-blowers machine, a moldcarrier, a sectional mold thereon,a stationary cam means connecting a mold-section therewith, suchconnection comprising a vertical and horizontal adjustment.

12. In a glass-blowers machine, a moldcarrier, a sectional mold thereon,a cam adjacent to the carrier, a connection between the mold-section andcam comprising the block Q, connected to the mold-section, the roller hconnected to the block Q and engaging the cam, the inclined head 7c onthe block Q, the counterweighted roller adapted to be struck by the head7c, and the plate/r over which said roller travels for the purposedescribed.

13. In a glass blowers machine, a movable mold-carrier, a multiple ofmolds thereon, an arm connected to each mold through which it may beclosed, and a common mechanism controlled by the blower into operativerelation with which the arm of each mold comes successively.

14. In a glass-blowers machine, a moldcarrier, -the molds thereon, anactuating device for the carrier, a mold-closing device, and connectionsbetween the two whereby they are required to be successively operatedand whereby the operation of one resets the other.

15. In a glass-blowers machine, a rotating mold-carrier, sectional moldsthereon, the cam around the carrier, a connection from the outermold-section' to said cam, said cam being shaped to first open, and thento close said mold-section, in the revolution of Lthe carrier, anoperating connection to the inner mold-section, for opening said sectionin the revolution of the carrier, and means by which the operator mayclose the inner section at the blowing-point.

' 16. In a glass-blowers machine, a movable mold-table, sectional moldsthereon, means by which the operator may move it through fractionalparts of a revolution, means for holding the mold closed during thefirst operation, and for opening the moldl having the blown articletherein, during the succeeding operation, said means comprising devicesfor irst separating the article and mold vertically, then opening themold-sections successively.

17. In a glass-blowers machine, a movable sectional mold,successively-operating mechanism for first opening both sections, fornext closing one section during the movement of the mold and means bywhich the operator may subsequently `close the mold.

18. In a glass-blowers machine, a sectional mold, mechanism forpositively opening and closing one section of the mold and mechanism foropening the other section simultaneously with the opening of the firstsection during the movement thereof, and independent means under thecontrol of the operator for closing said second section after the iirstsection is closed.

19. In a glass-blowers machine, a sectional mold, means for opening thesame comprising devices for initially opening one section to admit athin film of air around one side of the article, and devices forthereafter opening the mold to permit the article to be withdrawn.

:20. In a glass-blowers machine a sectional mold, means by which theoperator can move the mold away from the blowing-point to the oppositeside of the machine where the article may be removed, means for openingthe mold during such movement, means at the taking-ont point by whichthe operator may return the mold to the blowing-point, devices forclosing one section during such movement, and devices by which theblower can close the other section.

21. In a glass-blowers machine, a sectional mold, operating-cams foractuating the moldsections, connecting means between the cams andmold-sections comprising a vertical and horizontal adjustment.

22. In a glass-blowers machine, a sectional mold, its handles, such asP, of a bracket adjustable longitudinally thereon, and an actuating-camconnection with such bracket comprising a vertical adjustment.

In testimony whereof I aiiix my signature in presence of two witnesse's.

CLEMENT A. DUNBAR.

NVitnesses:

JAMES WHITTEMORE, M. B. ODOGHERTY.

